Fed Rate Decision September 2026: The Hike Bid Cracked on July CPI

The September 16 FOMC decision repriced in a single morning, and it moved toward a hold. Kalshi's hold contract last traded at 66c on August 12, 2026, up from a 57c close the day before. Polymarket's identical contract sits at 67c, up 8c on the day. Both books moved off the July CPI report released the same morning, which put headline inflation at 3.3% year over year, down from 3.5% in June. A 25bps hike is still live at 33c. Cuts are not live at all. Every cut outcome on the board combined trades at 2.5c.

For readers arriving from the July decision: the Federal Reserve held on July 29, 2026, and that contract settled at 100c on hold with $40.2M in volume. The target range has been 3.50% to 3.75% since December 11, 2025, per the Fed's own record of open market operations, and every 2026 meeting so far has left it there. September is the next live question, and it is the rare one where the tail risk points up instead of down.

Fed Rate Decision September 2026 Odds Today

Prices are last trade on each venue as of August 12, 2026. Combined board volume is $35.3M across both platforms.

Hold and hike-25 together account for 99c on Kalshi and 101c on Polymarket. Everything else is rounding. This is a two-outcome market wearing five outcomes, and the whole trade is whether the committee stays parked at 3.50% to 3.75% or takes the upper bound to 4.00%.

The July 29 Hold That Set Up the Fed Rate Decision September 2026

The July 2026 meeting produced no change, and the Fed Rate Decision Jul 2026 odds settled at 100c on the hold bracket. That result is now the anchor for September rather than a footnote. A committee that has left the upper bound at 3.75% for eight straight months, since December 11, 2025, has established a policy stance, not a pause.

What changed between the two meetings is the labor side. The July employment report, released August 7, 2026, showed nonfarm payrolls fell by 23,000, the first monthly decline of the year. That followed a gain of 20,000 in June and 148,000 in April, so the deceleration is four months old and now negative. The unemployment rate came in at 4.1%, down from 4.2% in June, which tells a friendlier story than the payroll line does.

The effective federal funds rate was 3.63% on August 11, 2026. That is the number the September decision moves or does not move.

Hold at 66c Is the Fed Rate Decision September 2026 Base Case

66c implies a 66% chance the Fed does nothing, and the data handed the committee a reason to do nothing this morning. Headline CPI at 3.3% is the coolest print since the spring, and core CPI came in at 2.5% year over year, down from 2.6% in June. Inflation moving the right way while payrolls go negative is the exact combination that argues for standing still.

The complication is that CPI is not the gauge the Fed targets. Core PCE ran at 3.3% year over year in June, the most recent month available from the Bureau of Economic Analysis, and headline PCE was 3.7%. Those two series and core CPI at 2.5% are telling materially different stories about where underlying inflation sits. With the effective funds rate at 3.63%, the real policy rate on the PCE measure is roughly zero. That is not restrictive, and it is why the hike leg refuses to die.

Hike 25bps Stays Live at 33c on the Fed Rate Decision September 2026 Board

33c is not a lottery ticket. It is a position with history behind it. Kalshi's September hike contract traded at 15c on June 4, 2026, and at 11c intraday on June 17 before closing that same session at 40c while the hold leg fell from 72c to 60c. It has held a 28c to 48c band ever since. Two months of range trading at those levels is a structural bid, not a one-day spasm.

The hawkish case is one number: policy is barely restrictive against a 3.3% core PCE run rate. The bearish case for that position is everything that happened this morning. The hike leg lost 10c on Kalshi and 7c on Polymarket in a single session on one CPI print, which tells you how sensitive it is to incoming data. The whole-year version of the same trade, Fed Rate Hike in 2026 odds, sits at 53c on Kalshi and 54c on Polymarket, also down about 5c today.

Why Cuts Are Dead on the Fed Rate Decision September 2026 Board

The three cut brackets total 2.5c combined. That is not a market pricing a small chance. That is a market pricing zero and leaving a penny on the screen for the tape.

Two separate boards on two separate platforms confirm it. Kalshi's Fed Rate Cuts in 2026 odds, a $40.2M market resolving December 31, 2026, prices exactly zero cuts for the full year at 86c. Polymarket's No Fed Rate Cuts in 2026 odds prices the same idea at 86c. Different question shapes, different order books, same number to the cent. When independent venues converge that precisely on a full-year path, the September cut legs are noise.

Fed Rate Decision September 2026 Cross-Platform Spread: Kalshi 66c, Polymarket 67c

On a $35.3M two-book market, no leg is more than 1c apart. Kalshi's hold went up 9c today, Polymarket's went up 8c, and they landed within a cent of each other. That agreement is the useful signal here. When two venues with different user bases, different collateral, and different fee structures independently arrive at 66c and 67c, the price is carrying information rather than liquidity noise.

It also means there is nothing to shop. Anyone scanning this board for a cross-platform divergence to trade will find a 1c print that a fee eats. The edge on this market is directional, and the direction question is hold versus hike.

When the Fed Rate Decision September 2026 Market Resolves

The FOMC meets September 15-16, 2026, per the Federal Reserve's published meeting calendar. The board resolves on the statement released at the conclusion of that meeting, with an expected expiration timestamp of 2:05 p.m. Eastern on September 16, 2026.

Resolution is measured as the change in the upper bound of the target federal funds range versus its level immediately before the meeting, using the FOMC statement and the Fed's open market operations record as the source of truth. Any change gets rounded up to the nearest 25bps bracket, so a 12.5bps move settles the 25bps leg. If no statement is issued by the end of the next scheduled meeting, the board resolves to no change.

Jobs, CPI, and PCE: The Fed Rate Decision September 2026 Catalysts

• July PCE on August 26, 2026:** The Fed's preferred gauge, last at 3.3% core. A second cooling print undercuts the entire hawkish argument.
• August jobs report on September 4, 2026:** July payrolls fell 23,000. A second consecutive negative month makes a September hike very difficult to defend.
• August CPI on September 11, 2026:** The final inflation reading before the decision, landing five days out with the board already priced.
• The 3.75% upper bound:** Unchanged since December 11, 2025. Any move off that level resolves this board away from hold, in either direction.
• The full-year cut count:** Kalshi's exactly-zero-cuts leg at 86c is the cleanest read on whether September is a pause or a floor.